Adjustable and throw-off roller-track for printing-presses.



PatentadAug. l9, I902.

. A; w. FBITL ADJUSTABLE AND THROW-OFF ROLLER TRACK FORPRINTING PRESSES.

( Application filed 360.12, 1901.)

(lo llodal J NITED- STATEs PATENT OFFICE."

ADOLPH w. F R'ITLZ' O F BURLINGTON, Iowa.

ADJUSTABLE AND THROW-OFF RQLLER-TRACK FOR PRINTING PRESSES.

SPECIFICATION forming part of Letters Patent No. 707,313, dated August 19,1902. Application filedDecember 12, 1901. Serial No. 85,685. (No model.)

To all whom it may concern.-

. Be it known that I, ADOLPH W; FRITZ, a citizen of the United States, residing'at Bur lington, in the county of DesiMoines and State of Iowa, have invented'a new and useful'Adjustable and Throw-OE Roller-Track for Printing-Presses, of which the'following' is a specification.

My invention relates to certain improvements in. printing-presses, and has for its principal object to provide adjustable tracks for the inking-rollers and to connect such tracks to theimpressi'onthrow-off mechanism in order to prevent contact between the rollers and type when the throw-off mechanism is shifted.

A further object of the invention is to provide for the adjustment of the'tracks for the purpose of governing the contact of the 'inking-roller with the type.

With these and other objects in View the invention consists in the novel construction and combination of parts hereinafter described, illustrated in. the accompanying drawings, and particularly pointedout in the appended claims.

In the drawings, Figure 1 is a side elevation of a portion of a printing-press, illustrat-' ing the construction and arrangement of an adjustable roller-track in accordance with my invention. Fig. 2 is a sectional plan view of,

a portion of the same on the line'2 2 of Fig;

1. Fig. 3 is a sectional elevationfon anenlarged scale, illustrating one of the rollertracks on a part of the press and the cam mechanism for operatingthe same. Fig. 4: is an elevation of a portion of the track looking toward the inner side thereof.- Fig. 5 is a detail sectional view of a part of the mechanism, particularly showing a spring attach= ment for returning the track to its normal position. Fig. 6 is a detail View of a portion of one of the inking-rollers and its guiding roller or truck. j

Similar numerals of-reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The drawings illustrate a portion of that type of press known as the Peerless jobpress, in which the body of the frame and the form are stationary and the platen-(not shown) has a reciprocating movement toward and fromthe form. That portion of the press illustrated inthe drawings includes :the upper part of the frame5, the cam-shaft 6,-the throw-off shaft 7,=thecOnnecting rOd-S, and theink-diskQ. The rod' 8 serves to connect the eccentric throw-01f shaft to the cam-shaft through the medium of a rock-lever 10, and the throw-off'mechanism is of theusual type, including a pivoted segment 11, adaptedto impart a quarter-turn to the eccentric shaft through the medium of.a ,pinion 12, a rockarm 13,crank 14:, and connecting-rod 15. The

inking-rollers 16 are carried by pivoted frames 17 and are operated in the usual manner. In a press of this type the function of the impres- .SlOll-lihl'OW-Off mechanism is to so alter the position ofth'e cam operating on the platen'as to prevent contact with'the'platenand the type, this being'accomplished bypartlymevolving the eccentric shaft 7 and transmitting,through the connecting-rod 8, a rearward movement .to the rock-lever 10 and cam-shaft 6, the position of the cam being altered to an extent fsufficient toprevent the type making an impression. The operation of this mechanism is well known in the art and does not require further detailed description but in ordinary practice the continued movement of the press after the throw -.off mechanism has been {shifted causes the inking-rollersto continue in contact with-the type, thussupplying the .type with-an 'unnecessaryquantity of ink. .To avoid this difficulty, I so arrange the rollertracks at the opposite sides of the chase as to effect a slight; movement of-such tracks to prevent any contact between the type and roller when the impression throw-off is shifted.

The bed 18 is supported in proper position by forwardly-projecting bed-brackets or frame extensions 19, and onsaid brackets or frame extensions the adjustable roller-tracks aremounted, the tracks being of the same construction and having a similar operation at opposite sides of thepress. Each track comprises a plate 21, which is reduced toward its rear extremity and has a curved recess 22 at its rear end and is adapted to fit within a cam-groove 23, extending around a portion of the circu mferenceof the shaft 7, the groove terminating in an abrupt shoulder or button 25,which is normally in contact with the lower rear edge of the plate 21. The front portion of the plate 21 is reduced, as at 26, to provide a tongue 27, which terminates at a rear shoulder formed by the reduction of the thickness of the plate, and at the upper and lower extremities the shoulder 28 is continued into ribs 29 by forming recesses 30 in the said plate fora purpose hereinafter described. The tongue 27 fits into a longitudinally-extending socket 31 at the rear portion of the inner side of the track member 32, said member consisting substantially of a fiat plate whose outer surface is flush with the plate 21 and integral horns 33, the upper of which alines with the upper surface of the inkdisk 9.

In the rear face of the track member 32 are formed slots 35, and extending rearwardly from the vertical walls of said slots and attached to the said member 32 are upper and lower adj listing-screws 36, having nuts 37 thereon, arranged one on either side of the ribs 29 and serving as a means of adjusting the relative positions of the plate 21 and the track member In order to hold the two sections in proper position and prevent any movement laterally, I provide the member 32 with longitudinal slots 39, through which extend set-screws 40 into the tongue 27. As the plate 21 is stationary, except at such times as the shaft 7 is revolved by the throw-off mechanism, I am enabled to adjust the position of the track member in accordance with the height of the type on the bed 18, the adjustment being for the purpose of governing the contact between the inking-roller and the type, the tracks being raised slightly beyond the normal level when the form is light or for printing half-tones or where the form contains ruling or perforated attachment, and thus avoiding any injury to the rollers, and in order to effect this adjustment without projecting the tracks for such distance as to endanger their contact with the platen I make the trucks or supporting-rollers 42 of much larger diameter than usual, as illustrated in Fig. 6. The truck-rollers in ordinary use are much smaller in diameter than the inking-rollers, the latter yielding as they pass over the type-bed, and where there is much rulework or where perforating attachments are employed the roller is soon destroyed. By making the truck-rollers of a diameter equal to that of the inking-rollers and by making the roller-tracks adjustable with respect to the type-bed I am enabled to adjust the pressure of the rollers in accordance with the character of the work.

The opposite sides of the bed 18 are provided with forwardly-projecting guards 43, which serve to hold the form in place, and these guards fit within slots 44 in the inner sides of the truck end portion of the track members 32, the guards 43 being of less width than the slots 44, so that the improved attachment as an entirety may move longitudinally of the brackets or frame extensions, and

in order to guide the track members in such movement and to hold them in proper relation to the form each track member is provided with upper and lower horizontally-disposed slots 46, through which are passed guiding bolts or screws 47, secured in the guards 43.

When the throw-off mechanism is actuated, the shaft 7 is turned to the extent of a quarter of a revolution, its cam-slot 23 acting on the rear end of the plate 21 and serving to move the roller-tracks to a position slightly above the type-level, so that the inking-rollers will be held from contact with the type until the impression throw-off is returned to its normal position, the track members being then moved to the rear by suitable springs 48. By thus forcing the track members above the type-level and preventing contact from the inking-rollers with the type I am enabled to supply the ink-disk with a fresh quantity of ink and to distribute the same by the operation of the inking-rollers without clogging the type with ink.

The invention is illustrated and described as applied to a press in which the form is stationary and the platen is vibrated to carry the paper into contact with the type; but it will be understood that the device may be applied to presses of the Gordon or other types of job-presses without departing from my invention.

Having thus described myinvention, what I claim is-- 1. The combination with a printing-press, of an impression-throW-ofi shaft having camgrooves, and a frame arranged at each side of the press and adapted to be operated by said cam-grooves, each of such frames comprising a'roller-track member and a carrying-plate connected thereto and means for adj ustably securing the rollertrack member and the carrying-plate to regulate the pressure of the inking-roller on the type.

2. In an attachment of the class set forth, comprising a rear plate having a forwardlyprojecting tongue formed by reducing the outer portion of the plate, a track member provided with track extensions and having a socket to adj ustably receive said tongue, and screw adjusting devices engaging portions of the said plate and track member.

3. An attachment of the class set forth,

comprising a roller-track member guided at each side of the bed of the press, a plate, means for adjustably securing said plate to said roller-track member to regulate the respective planes of the roller-track member and the surface of the type, and means for operatively connecting said plate to the impression-throw-ofi shaft, substantially as specified.

4. The combination with inkingrollers and a form-bed, of guard devices at opposite sides of the formbed, adjustable track attachments at opposite sides of the form-bed hav- IIO ing slots to receive said guard devices, and means for causing the attachments to move forwardly and rearwardly.

5. The combination with a printing-press having an impressi0n-thr0w-off shaft provided with cam-grooves, of a roller-track member situated at each side of the press and provided with horizontally-disposed slots, guiding bolts or screws adapted to said slots and carried by the frame of the press, a plate having its rear end adapted to the cam-groove, adjustable screws connecting the plate and In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

ADOLPH W. FRITZ.

Witnesses:

WM. M. BOUGERT, CHAS. M. SCHWINN. 

